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Dr. Martin Chenier, Assistant Professor

bio

Department of Food Science and Agricultural Chemistry - Cross-appointment in the Department of Animal Scince (http://www.mcgill.ca/animal/staff/faculty/chenier)
Macdonald Campus, McGill University
Macdonald-Stewart Building, room MS1-030
21,111 Lakeshore
Ste Anne de Bellevue, Quebec
H9X 3V9
Canada

Email: martin [dot] chenier [at] mcgill [dot] ca
Tel.: 514-398-7923
Fax: 514-398-7977

Education

Postdoctoral Fellow, INRS - Institut Armand-Frappier, Laval, QC, Canada, 2004-2007. Project: Fate of antibiotic resistance in an aerobic thermophilic biotreatment for swine waste.

Ph.D. Microbiology, McGill University, Montreal, QC, Canada, 2004 Project: Impact of seasonal variations, nutrients, pollutants and dissolved oxygen on the microbial composition and activity of river biofilms

M.Sc. Applied Microbiology, INRS - Institut Armand-Frappier, Laval, QC, Canada, 1996. Project: Study of pentachlorophenol biodegradation in aerobic and anaerobic conditions

B.Sc. Microbiology, Laval University, Quebec City, QC, Canada, 1994

Research Interests

  • Agricultural microbiology: animal, food and soil microbiology
  • Ecology of antibiotic resistance, functional biodiversity and phylogenetic biodiversity of Bacteria and Archaea in animal and plant production ecosystem

             The theoretical approach of my research activities lies in the application of whole-community investigations (metagenomics) to elucidate the ecology of complex microbial communities in agricultural ecosystems. This is sustained by an experimental approach integrating complementary molecular and classical microbiology techniques in order to globally characterize the molecular and cellular microbial ecology of such communities and ecosystems.

We have initiated investigations in the area of Bacterial and Archaeal ecology in the pre-harvest environment of animal and plant production, with a particular focus on the dynamics of antibiotic resistance and biodiversity in commensal anaerobic bacteria in swine production. It is known that, in the mammal gut, pathogens are largely outnumbered by commensals, which can both harbor antibiotic resistance genes, and that anaerobes dominate over aerobes in terms of abundance. Thus, it is hypothesized that anaerobic commensal bacteria constitute the numerically and ecologically dominant sub-population in the swine large intestine. The fundamental questions addressed by my research program are:

  • How antibiotic additions to swine feed influence the occurrence of bacterial resistance to antibiotics in swine production?
  • Which bacterial species and mobile genetic elements (plasmids, transposons, integrons) are involved in the dissemination of ecologically advantageous antibiotic resistance genes in swine production?
  • What are the temporal evolution and geographical distribution of bacterial resistance to antibiotics in swine production?

 

Teaching responsibilities

 

Selected Recent Publications

Pakpour S, Jabaji S, Chénier MR (2012) Antibiotic resistance in swine production 2.5 years after discontinuation of antibiotic use.  Microbial Ecology,  63:41-50.

Hussain SA, Prasher SO, Chénier MR, Arya G (2010) Removal of nitrate-N by antibiotic-exposed bacterial isolates from a constructed wetland. World Journal of Microbiology and Biotechnology, 27:2061–2069.

Chénier MR, Juteau P (2009) Impact of an aerobic thermophilic sequencing batch reactor on antibiotic-resistant anaerobic bacteria in swine waste. Microbial Ecology, 58:773-785.

Chénier MR, Juteau P (2009) Fate of chlortetracycline- and tylosin-resistant bacteria in an aerobic thermophilic sequencing batch reactor treating swine waste. Microbial Ecology, 58:86-97.

Chénier MR, Beaumier D, Roy R, Driscoll BT, Lawrence JR, Greer CW (2006) Influence of nutrient inputs, hexadecane and temporal variations on nitrification and exopolysaccharide composition of river biofilms. Canadian Journal of Microbiology, 52(8): 786-797.

Chénier MR, Beaumier D, Fortin N, Roy R, Driscoll BT, Lawrence JR, Greer CW (2006) Influence of nutrient inputs, hexadecane and temporal variations on denitrification and community composition of river biofilms. Applied and Environmental Microbiology, 72(1):575-584.

Lawrence JR, Chénier MR, Roy R, Beaumier D, Fortin N, Swerhone GDW, Neu TR, Greer CW (2004) Microscale and molecular assessment of impacts of nickel, nutrients and oxygen level on structure and function of river biofilms. Applied and Environmental Microbiology, 70(7):4326-4339.

Chénier MR, Beaumier D, Roy R, Driscoll BT, Lawrence JR, Greer CW (2003) Impact of seasonal variations and nutrient inputs on nitrogen cycling and degradation of hexadecane by replicated river biofilms. Applied and Environmental Microbiology, 69(9):5170-5177.